12 timestamped notes explaining the Korean cultural context in this episode — customs, idioms, food, honorifics, and history, at the moment each appears on screen. These notes discuss events across the whole episode. To see them revealed scene-by-scene as you watch, use the episode page to find an airing.
The officer is reading a 미란다 원칙 (Miranda-style rights notice), which Korean law requires officers to recite at the moment of arrest. It covers the right to a lawyer, the right to speak in your own defence, and the right to request a court review of whether the arrest was lawful. Suspects must be told all three before being taken in.
펀치 드렁크 증후군 is what doctors now call Chronic Traumatic Encephalopathy (CTE) — brain damage that builds up from repeated blows to the head over a fighting career. Symptoms include memory loss, slurred speech, and mood swings. It is a serious, irreversible condition, which is why the kids are so alarmed.
수목장 is a form of eco-burial where cremated remains are mixed into the soil around the base of a tree, which then becomes a living memorial. It has grown popular in South Korea as an alternative to traditional grave plots, which are expensive and take up scarce land. The tree is typically chosen or planted by the family.
선택적 함묵증 means 'selective mutism' — a condition where a child who can physically speak chooses not to, usually because of a psychological trauma or extreme anxiety. The doctor is explaining that young Geu-ru's silence was not a medical defect but a response to something overwhelming happening in his life.
Busan sits on the warm southern coast, so heavy snowfall there is genuinely rare — the city averages only a handful of snowy days a year. The older firefighter's excited shout for everyone to come outside captures how a light snowfall in Busan feels like a small miracle worth stopping work for.
South Korea became one of the world's largest sources of overseas adoptees after the Korean War, and international adoptions continued at high rates through the 1980s and 90s. By the time this flashback is set, there was growing public criticism of the practice; the government had been slowly tightening rules, but infants without identified parents were still frequently placed abroad.
The fire chief quotes the popular Korean saying that long-married couples end up resembling each other — in personality, habits, and even appearance. He then one-ups it by saying Geu-ru's parents weren't two people who grew similar over time; they looked like a single person split into two from the very beginning.
The label on the MP3 player reads 'Prelude in C major — Bach.' This is the opening piece of Bach's Well-Tempered Clavier, one of the most recognisable pieces in classical music — simple, steady, and quietly hopeful. Geu-ru choosing it to accompany his father's final clearance job says something about how he wants to honour that moment.
'참 잘했어요' means 'You did really well' — it is the phrase printed on the gold star stickers Korean elementary school teachers stamp on good work. For a child, getting that stamp is a small but meaningful moment of praise. Jeong-u turning it into a daily ritual between himself and Geu-ru made it their private language for unconditional approval.
Korea's adult guardianship law (후견 제도), reformed in 2013, allows a court to appoint a 후견인 (guardian) for adults who need support making decisions — including people with developmental disabilities. A 후견 감독인 is an independent supervisor who checks that the guardian is acting in the person's best interests. The ward's own wishes carry significant weight in whether a guardian stays or goes.
나무 means 'tree' in Korean, and 그루 is the counter word for counting trees (한 그루 = one tree). Na-mu's dad is pointing out that the two names are not just both tree-related — grammatically, 그루 is the word you need to count a 나무. They are quite literally made for each other by the language itself.
The student has come to arrange Move to Heaven's services for herself, knowing she will die soon. In Korea it is not unheard of for terminally ill people to pre-arrange 유품 정리 (belongings clearance) so the burden does not fall on family. The show is setting up its final case around this quietly dignified — and legally straightforward — act.